Characteristics according to din43760, Zni1000 – Diodes ZNI1000 User Manual
Page 3
ZNI1000
© Zetex Semiconductors plc 2007
Characteristics according to DIN43760
Resistance at a given temperature
R(T) = R0 x (1 + A x T + B x T
2
+ C x T
4
+ D x T
6
)
Formula for temperature at a given resistance
coefficients:
A = -412.6
B = 140.41
C = 0.00764
D = -6.25 x 10
-17
E = -1.25 x 10
-24
Self heating
For accurate temperature measurement it's recommended to choose a small current in order to
avoid self heating of the resistor. The temperature failure caused by the measurement current can
be calculated with:
⌬T = P/EK
where P = I² * R is the heat power caused by the measurement current and EK is the self heating
coefficient.
The self heating coefficient for the Ni1000-SOT is:
EK = (1.7 ± 0.3) mW/K (Air: 23°C; no air flow).
R0
Resistance at 0°C
B
6.650 x 10
-6
T
Temperature in °C
C
2.805 x 10
-11
A
5.485 x 10
-3
D
-2.000 x 10
-17
T R
( )
A
B
1
C
R
Ч
+
Ч
D
R
5
×
E
R
7
Ч
+
+
+
=